Adenoviruses and cytomegalo virus use to reduce the surface expression of class I MHC molecules, 

Measles virus and HIV, reduce levels of class II MHC molecules on the surface, 

Vaccinia virus, secreting a protein that binds to the C4b complement component.

TLS Online TPP Program

#Id: 8130

#XL - Q Biochemistry

TLS Online TPP Program

#Id: 8129

#XL - Q Biochemistry

Some other biologically active isoprenoid compounds or derivatives.

TLS Online TPP Program

#Id: 8127

#XL - Q Biochemistry

β-Carotene is the precursor of vitamin A1.
Oxidation at C-15 converts retinol to the aldehyde, retinal, and further oxidation produces retinoic acid, a hormone that regulates gene expression. 

TLS Online TPP Program

#Id: 8126

#XL - Q Biochemistry

TLS Online TPP Program

#Id: 8125

#XL - Q Biochemistry

Steroids derived from cholesterol.

TLS Online TPP Program

#Id: 8120

#XL - Q Biochemistry

Arachidonic acid and some eicosanoid derivatives.